Study On The Anaerobic-aerobic Process For Streptomycin Wastewater Treatment And Removing Sulphur And Nitrogen Simultaneously

Antibiotic pharmacy wastewater is a kind of complex organic wastewater containing high contents of sulfate and material restraining biological, which is difficult to be biodegraded. There is a big unbalance between the nutrition resources of C and N (Nitrogen is superfluous). Aiming directly at the problem of antibiotic wastewater treatment technology, antibiotic wastewater treatment technologies of late years at hone and abroad are analyzed generally. The biological process treating streptomycin wastewater and mechanism removing S and N are studied. The anaerobic-aerobic system treating streptomycin wastewater, which removes N and S in the meantime, is set up and experimented, which removes N and S in the meantime.The results show: The unbalance between the nutrition resources of C and N and the high contents of sulfate are the main factors affecting the removal of COD from streptomycin wastewater. The effect of sulfate reduction in anaerobic digestion process is controlled effectively by back flowing the aerobic effluent to the anaerobic treatment part in the anaerobic-aerobic system which enforce the effect of the removal of N . The organic material is removed effectively and in the meantime the removal of S and N is achieved. The ratio of backflow from nitrification reactor to the denitrification process was a main factor, which affects the removal of nitrogen. The outcome of sulfate reduction was a main part of electronic donator in the process of denitrification.Combined with the current engineering of streptomycin wastewater treatment, a system of Expand Grain Sludge Bed Reactor (EGSB)-aerobic contract oxidation that remove S and N simultaneously is utilized A preferable treatment result is achieved by using this system in capacity of 1500 m³ streptomycin production mix organic wastewater treated daily. The general COD removal rate could be above 94.9%, the effluent COD is less than 213mg/L, the NH₃-N is less than 20.0mg/L, A new way is explored in the treatment of antibiotic wastewater which is difficult to be biodegraded way.